Measurement of the CKM angle γ with $B_s^0 → D_s^∓K^±$ decays

This document reports the first measurements of the time-dependent CP violating observables in Bs0→Ds∓K± decays. The measurements are performed using data corresponding to an integrated luminosity of 1fb−1 collected in 2011 by the LHCb detector. The CP violating observables: Cf=0.53±0.25±0.04 , AfΔΓ=0.37±0.42±0.20 , Af‾ΔΓ=0.20±0.41±0.20 , Sf=1.09±0.33±0.08 , Sf‾=0.36±0.34±0.08 are found, where the uncertainties are statistical and systematic. Later, these observables are used to deterimine the CKM angle γ from Bs0→Ds∓K± decays. A γ value of (115−43+28)° modulo 180° at 68% CL is found, where the uncertainty contains both statistical and systematic components.